CPU won't POST if there's pressure on it

ok heres my stupid problem with my cpu. i notice that if i tighten the screws that hold my waterblock down. my sytem wont boot. if i let it loose to the point that i can actually move the waterblock around, it boots. what is up with this. i know its not the mobo because i try another cpu with all the screws tighten it boot fine. is it something with the pins? i had them bent but straighten out with a pencil

As you increase pressure on the chip it is like placing additional weight on the proc. The max recommended weight allowed is under 400 grams. It more you crank down the screws the more pressure or weight is place on the proccessor in the socket causing the socket and proccessor chip to deform. Not a happy thing.